mpc8572ds & uImage: Stuck startup

Isaac Gomez Morales isaac.gomez.morales at
Thu Sep 17 20:04:36 EST 2009


I'm trying to startup the latest kernel image (2.6.31) for my mpc8572ds
machine.  I have downloaded the kernel's source code at and i
have compiled it with a native ppc compiler using make uImage.

At this moment I have in my system my uImage and u-boot-2009-08 programmed
in the flash memory. The bootargs are "root=/dev/sda6 rw
console=ttyS0,115200" and the dtb file was generated by the script dtc
included in the same kernel source code.

I have done:

../path_to_script/dtc -I dts -O dtb -o mpc8572ds.dtb

An finally I have executed the following instruction with the following

=> ext2load scsi 0:6 0x01000000 /boot/uImage
Loading file "/boot/uImage" from scsi device 0:6 (sda6)
1582778 bytes read
=> ext2load scsi 0:6 0x00c00000 /boot/mpc8572ds.dtb
Loading file "/boot/mpc8572ds.dtb" from scsi device 0:6 (sda6)
13748 bytes read
=> bootm 1000000 - c00000
WARNING: adjusting available memory to 30000000
## Booting kernel from Legacy Image at 01000000 ...
   Image Name:   Linux-2.6.31
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    1582714 Bytes =  1.5 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
## Flattened Device Tree blob at 00c00000
   Booting using the fdt blob at 0xc00000
   Uncompressing Kernel Image ... OK

The startup stuck here and I don't know why, I have tried to startup my
kernel with old dtb's files but i have get some "kernel panic" errors and
some "bad structure of the file (/choosen)".

Note: I can start an older kernel with its dtb file.

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